#box{
    width: 1350px;
    position: relative;
    margin: 30px auto;
}
#small{
    width: 600px;
    height: 600px;
    position: absolute;
}
#smallImg{
     width: 600px;
     height: 600px;
     position: absolute;
     top: 0;
     left: 0;
     outline: 2px solid red;   
}
#move{
    width: 300px;
    height: 300px;
    background:rgba(0,0,0,0.5);
    position: absolute;
    left: 0;
    top: 0;
}
#big{
    width: 600px;
    height: 600px;
    outline: orange;
    position: absolute;
    right: 0;
    top: 0;
    overflow: hidden;
}
#bigImg{
    position: absolute;
    top: 0;
    left: 0;
    width: 1800px;
    height: 1800px;
}